Mine screws up when I go to close it... it falls toward the front of the car leaving a gap at the back... have to put it almost up, squeeze my fingers in there to yank it back into the slot and put it the rest of the way up to get it to seal. I took the door apart to tighten the 2 bolts that hold the glass at the bottom to the plastic bit that slides on the post, and the stpid things are weird nuts that snap on but can't be tightened up... I was thinking of replaing them with a couple bolts and some soft rubber washers... then the window would stay where it's suppose to. Any thoughts on doing this?